/*
 * Copyright (c) JForum Team
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met:
 * 
 * 1) Redistributions of source code must retain the above 
 * copyright notice, this list of conditions and the 
 * following  disclaimer.
 * 2)  Redistributions in binary form must reproduce the 
 * above copyright notice, this list of conditions and 
 * the following disclaimer in the documentation and/or 
 * other materials provided with the distribution.
 * 3) Neither the name of "Rafael Steil" nor 
 * the names of its contributors may be used to endorse 
 * or promote products derived from this software without 
 * specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT 
 * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, 
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 
 * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 
 * IN CONTRACT, STRICT LIABILITY, OR TORT 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
 * 
 * Created on Mar 11, 2005 12:01:47 PM
 * The JForum Project
 * http://www.jforum.net
 */
package net.jforum.search;

import java.util.ArrayList;

import net.jforum.entities.Post;
import net.jforum.exceptions.SearchInstantiationException;
import net.jforum.util.preferences.ConfigKeys;
import net.jforum.util.preferences.SystemGlobals;

import org.apache.log4j.Logger;

/**
 * @author Rafael Steil
 * @version $Id: SearchFacade.java,v 1.8 2007/09/09 22:53:35 rafaelsteil Exp $
 */
public class SearchFacade {
    private static SearchManager searchManager;
    private static Logger logger = Logger.getLogger(SearchFacade.class);

    public static void init() {
	if (!isSearchEnabled()) {
	    logger.info("Search indexing is disabled. Will try to create a SearchManager "
		    + "instance for runtime configuration changes");
	}

	String clazz = SystemGlobals
		.getValue(ConfigKeys.SEARCH_INDEXER_IMPLEMENTATION);

	if (clazz == null || "".equals(clazz)) {
	    logger.info(ConfigKeys.SEARCH_INDEXER_IMPLEMENTATION
		    + " is not defined. Skipping.");
	} else {
	    try {
		searchManager = (SearchManager) Class.forName(clazz)
			.newInstance();
	    } catch (Exception e) {
		logger.warn(e.toString(), e);
		throw new SearchInstantiationException(
			"Error while tring to start the search manager: " + e);
	    }

	    searchManager.init();
	}
    }

    public static void create(Post post) {
	if (isSearchEnabled()) {
	    searchManager.create(post);
	}
    }

    public static void update(Post post) {
	if (isSearchEnabled()) {
	    searchManager.update(post);
	}
    }

    public static SearchResult search(SearchArgs args) {
	return isSearchEnabled() ? searchManager.search(args)
		: new SearchResult(new ArrayList(), 0);
    }

    private static boolean isSearchEnabled() {
	return SystemGlobals.getBoolValue(ConfigKeys.SEARCH_INDEXING_ENABLED);
    }

    public static void delete(Post p) {
	if (isSearchEnabled()) {
	    searchManager.delete(p);
	}
    }

    public static SearchManager manager() {
	return searchManager;
    }
}
